Adding directories to @INC

For each directory in LIST (called $dir here) the lib module also
checks to see if a directory called $dir/$archname/auto exists.
If so the $dir/$archname directory is assumed to be a corresponding
architecture specific directory and is added to @INC in front of $dir.
lib.pm also checks if directories called $dir/$version and $dir/$version/$archname
exist and adds these directories to @INC.

The current value of $archname
can be found with this command:

perl -V:archname

The corresponding command to get the current value of $version
is:

perl -V:version

To avoid memory leaks, all trailing duplicate entries in @INC are
removed.

Deleting directories from @INC

You should normally only add directories to @INC. If you need to
delete directories from @INC take care to only delete those which you
added yourself or which you are certain are not needed by other modules
in your script. Other modules may have added directories which they
need for correct operation.

The nolib
statement deletes all instances of each named directory
from @INC.

For each directory in LIST (called $dir here) the lib module also
checks to see if a directory called $dir/$archname/auto exists.
If so the $dir/$archname directory is assumed to be a corresponding
architecture specific directory and is also deleted from @INC.

Restoring original @INC

When the lib module is first loaded it records the current value of @INC
in an array @lib::ORIG_INC
. To restore @INC to that value you
can say

@INC = @lib::ORIG_INC;

CAVEATS

In order to keep lib.pm small and simple, it only works with Unix
filepaths. This doesn't mean it only works on Unix, but non-Unix
users must first translate their file paths to Unix conventions.

NOTES

In the future, this module will likely use File::Spec for determining
paths, as it does now for Mac OS (where Unix-style or Mac-style paths
work, and Unix-style paths are converted properly to Mac-style paths
before being added to @INC).